Truck mounted machine for loading and manipulating materials



Oct. 18, 1955 LE GRAND H. LULL 2,720,993

TRUCK M ED MACHINE FOR LOADING AND Fi l e d D e C l 2 l 9 51 INVENTOR.4z6R4/vo 1% Lou. BY

QWQMM ,4 TORA/EYS Oct. 18, 1955 LE GRAND H. LULL 2,720,993

TRUCK MOUNTED MACHINE FOR LOADING AND MANIPULATING MATERIALS Filed Dec.12, 1951 6 Sheets-Sheet 2 FIE'E INVENTOR. is 6 1mm )6. 11/44 BY A rTORNEYS Oct. 18, 1955 LE GRAND H. LULL 2,720,993

TRUCK MOUNTED MACHINE FOR LOADING AND MANIPULATING MATERIALS Filed Dec.12, 1951 6 Sheets-Sheet 3 1Q INVENTOR.

is 6 1mm 2% 4mm N Y QQALW Arr-a ,vsys

Oct. 18, 1955 Filed Dec. 12, 1951 LE GRAND H. LULL TRUCK MOUNTED MACHINEFOR LOADING AND MANIPULATING MATERIALS 6 Sheets-Sheet 5 Q no um W E?INVENTOR.

4545mm )9. 4044. BY

Oct. 18, 1955 LE GRAND H. LULL TRUCK MOUNTED MACHINE FOR LOADING ANDMANIPULATING MATERIALS 6 Sheets-Sheet 6 Filed Dec. 12, 1951 INVENTOR. 4E6 1M440 :9! 41/44.

+ (1 a 47' TORA/EYS United States Patent Of TRUCK MOUNTED MACHINE FORLOADING AND MANIPULATING MATERIALS Le Grand H. Lull, luinneapolis,Minn., assignor to 1250 West 80th Street Corporation, a corporation ofOhio Application December 12, 1951, Serial No. 261,228 12 Claims. (Cl.214-670) This invention relates to improvements in machines for loadingand handling materials and loads of all kinds, and particularly lengthyand heavy loads which must be accurately positioned for stacking and thelike. In general the machine constituting the present invention issimilar to that disclosed in my prior application Serial No. 139,912,filed January 21, 1950, now Patent No. 2,621,812, and further embodiesthe general principles of the machine disclosed in my earlier filedapplication Serial No. 56,071, filed October 23, 1948 now Patent No.2,621,811. The actual, vertically movable tower structure is furthermoreessentially identical to that shown in my Patent No. 2,394,458, issuedFebruary 6, 1946.

The primary object of my present invention is to provide a machinewherein the ultimate load holder, whether it be a fork, skid, sling orthe like, may be accurately positioned in no less than six differentdirections or planes, selectively or simultaneously, under hydrauliccontrol and in such fashion as to raise and lower the load, traverse ittransversely of the direction of travel of the machine, tilt it withrespect to the machine, translate it or move it lengthwise, pitch it ortilt it in a longitudinal plane, and finally yaw it in a horizontalplane. Accurate and precise control of all of these various movementswill permit the operator to position the load for starting, for loadingor for mounting in a surrounding structure, and the machine is of suchcapacity that very long and very heavy loads may be so handled.

Another object of my present invention is to provide a simple mountingand actuating mechanism for the load carrier whereby the translate,pitch and yaw motions aforesaid may be given the load, in addition tothe three motions possible in the machine of my application Serial No.139,912, and to embody these mounting and actuating means in the form ofan attachment for the load carrier, in connection with a load holder orskid structure particularly suited to handling of long materials andloads. Such holder or skid structure further includes, in accordancewith this object, a platform on which an operator may stand close to theload as it is elevated and positioned, with duplicate controls for allof the six motions under the hand of the operator riding with the load.

These and other more detailed and specific objects will be disclosed inthe course of the following specification, reference being had to theaccompanying drawings, in which- Fig. 1 is a side elevation of a machineaccording to my present invention and showing for purposes ofillustration an elongated, cylindrical load supported in the load holderin an elevated and tilted or pitched position.

Fig. 2 is a plan view of the machine with the load itself removed inorder to expose the details of the load holder and showing the latterswung about or yawed to an angular position with reference to thedirection of travel of the machine.

Fig. 3 is an enlarged fragmentary vertical cross-sec- 2,720,993 PatentedOct. 18, 1955 2 tional view taken substantially along the line 3-3 inFig. 1, but with the load in a relatively lowered position.

Fig. 4 is a side elevation viewing the machine from the opposite side ascompared to the showing in Fig. 1.

Fig. 5 is an enlarged side elevational View of the upper portion of theloader structure, per se, with the load holder omitted and illustratingthe mechanism by which the load is angularly tilted or pitched.

Fig. 6 is an enlarged sectional detail view taken substantially alongthe line 6-6 in Fig. 5.

Fig. 7 is a horizontal sectional and plan view substantially along theline 77 in Fig. 3.

Referring now more particularly and by reference characters to thedrawing, the material loading and manipulating machine as disclosedtherein comprises a main vehicular frame, designated generally at 10,having front and rear supports or platforms 11 and 12 which are joinedat one side of the machine by a heavy backbone structure 13. Thisconstruction of the frame forms an opening 14 between the supports 11-12in which is mounted the loading mechanism as will be presentlydescribed, and beneath these supports I provide ground wheels 15, therear pair of which is driven by an engine located on and enclosed by therear support, as more particularly pointed out in my copendingapplication Serial No. 139,912. In fact this vehicular andself-propelled frame structure or vehicle is almost exactly identicalwith that disclosed in the prior application, except that the forwardlyand laterally located operators station, designated generally at 16, isherein shown as provided with an enclosed cab 17. The constructionaccordingly will not be described in detail herein eXcept wherenecessary to bring out the construction and operation of the loaderconstituting the present invention.

Arranged in the aforesaid opening 14 is a loader mechanism, which isdesignated generally at 18, and the load elevating portion of which isessentially identical to that disclosed in my prior Patent No.2,394,458. This load elevator has a vertical, collapsible andtelescoping tower comprising an inner section 19 having rollers 20 atits sides, upon which is guided an outer tower section 21 for up anddown movements. For thus moving the outer tower section 21 I provide apair of hydraulic rams, having cylinders 22 based at their lower ends atthe bottom of the inner tower section 19, and having their upwardlyextended reciprocating plungers 23 attached to a header 24 which capsthe upper end of the tower section 21. Thus it will be apparent that theupward projection of the plungers 23 will elevate the tower section 21,while the downward movement of these plungers will permit the tower tocollapse or telescope in the downward direction. Also forming part ofthis tower is an upwardly and downwardly movable mounting member orplate 25, having front and rear flanges 26 and these flanges are fittedwith rollers 27 which are guided in channels along the opposite edges ofthe tower section 21. Cables 28 are secured to this mounting plate 25,as indicated at 29, from which point the cables run upwardly over headpulleys 30 atop the header 24 and downwardly along what may be calledthe back of the loader to points 31 at which the cables are secured tothe inner tower section 19. Thus as the outer tower section 21 iselevated the mounting plate 25 will be carried along, but the resultingpull upon the cables 28 will also move this mounting plate upward toobtain a maximum elevation of the load. As stated, this loaderconstruction, per se, is very similar to that disclosed in my earlierpatent to which attention is invited for further details of itsconstruction and operation. It is to be noted, however, that as shown inFig. 5 the mounting plate 25 projects forwardly and rearwardly somedistance beyond the corresponding edges of the loader to r stru ture,and to P ide added s pp r for this plate so that it may resist thetwisting stresses placed upon it by the load, the flanges 26'areprovided with inwardly turned cars 32 having auxiliary rollers 33 ridingin the aforesaid channels of the tower section 21. Such rollers 33 areprovided at the upper and lower ends of both flanges 26 and will ridethe vertical faces 34 of the channels in rolling contact therewith tosupport the plate, without interfering with its up and down motion asjust described.

This loader structure 18 is mounted in the opening 14 by a U-shapedcarriage having front and rear ends 35 and 36 rigidly connected by alongitudinal back bar 37,

and these ends 36 have channels on their opposite front and rearvertical edges as seen in Fig. 1. Vertical panels 38 and 39 are securedto the supports 11-12 and are provided with rollers 40 which ride in theouter channels of the carriage at 3536, so that this carriage as a wholemay have a traverse motion, horizontally and transversely with r spectto the direction of travel of the machine. Thus the carriage may beprojected in the opening 14 outward toward the open side of the machineand for this purpose there is provided, over each end 35-36 of thecarriage, a transversely mounted, hydraulic ram having a cylinder 41anchored at 42 at its inner end to a lug 43 secured to the backbone unit13. Projecting then from each cylinder 41 toward the open side of theframe is a plunger 44, which is attached at 45 to a bracket 46 securedto the adjacent end of the carriage, and the arrangement is thus suchthat the supply of fluid under pressure through conduits 47 to theopposite ends of each cylinder 41 will project the plungers 44 andtraverse the carriage out toward the open side of the machine or retractthe plungers to pull the carriage back into the opening 14. Carrierplates 48 are provided immediately inside each end 3536 of the carriageand are provided with rollers 49 by which the plates are travel mountedin the inner channels of said carriage. For traveling these carrierplates 48 I provide at each end of the structure a sprocket chain 50which operates over sprockets 51 and 52. The sprockets 51 are journaledbetween brackets 53 depending from the carriage adjacent the back bar 47and are connected to operate in unison by a heavy, forwardly andrearwardly extending, tubular shaft '54. p sprockets 52 are journaled at55 in adjustable clips 56 supported in brackets 57, hung from the opennds of the carriage, and this adjustment is, of course, for the purposeof maintaining the chains in a taut condition. Each sprocket chain 50 issecured at 58 to an angle 59 secured to the adjacent panel 38 or 39 andis also attached at its upper flight at a suitable point to the adjacentcarrier plate 48, as indicated at 60. The arrangement is thus such thatthe hereinbefore described traverse motions of the carriage will impartmotion to the sprocket chains 50, due to the fact that they are securedto the stationary panels, and thus while the carrier plates 48 will movewith the carriage they will also be traversed with respect thereto sothat the carrier plates will move toward the open side of the machineand will reach the open end of the carriage as the carriage itselfreaches its maximum outer position, and vice-versa, The loader 18 hasits inner tower sections 19 rigidly attached by brackets 61 to a heavytorque tube 62, and this tube is secured at its extremities to swingableend plates 63 located alongside each carrier plate 48. Each end plate 63is then pivoted at 64 at its upper portion to the corresponding upperend of the adjacent carrier plate 48, so that the loader will besupported for travel by these carrier plates, but may swing about thepivots 64 for tilting movement in a vertical, transverseplanfi. For thustilting the loader about these pivots 64 I provide the tiltingmechanism, best illustrated in Fig. 7, wherein it will be noted that aheavy tie bar 65 is connected 'to the carrier plates 48 and extendsforwardly and rearwardly therebetween. Positioned parallel with this tiebar 65 is a The hyd auli ram h v a y r 6 nd plunger 67 and, of course,provided with suitable flexible conduits 68 for supplying fluid to thecylinder to project or retract said plunger. Bracket plates 69 aresecured to the opposite ends of the tie bar 65' and carry pivot pins 70by which toggle links 71 are swingably mounted, and these links at theiropposite ends are pivoted at 72 between the ends of toggle links 73. Theopposite ends of the links 73 are then pivotally connected at 74 to theopposite ends of the cylinder 66, and plunger 67, and at 75 to lugscarried by the end plates 63. Thus the arrangement is su'ch that theprojection of the plunger 67 by fluid entering the cylinder 66 willstraighten out the toggle links 71 and 73 to swing the lower ends of theplates 63 toward the open side of the machine, and vice-versa, toaccomplish the desired tilting movements of the loader 18, as well as tohold it in any adjusted position.

The traversable carriage and tilting mechanism just described areidentical to the corresponding construction in my prior applicationSerial No. 139,912 and are not believed to require any furtherdescription herein.

Also as disclosed in that earlier application the present machine isprovided, at its open side. and adjacent the front and rear corners ofthe opening 14, with outwardly and downwardly projectable jacks 76having feet 77 which may be thrust against the ground in order tosupport this side of the machine while the load is being raised orlowered, and particularly to bring this support out as far as possiblefrom the open side of the machine. These jacks 76 are hydraulicallyactuated, but the mechanism for their actuation having been previouslydescribed will be omitted herein.

According to the present invention I provide in face to face relationwith the aforesaid mounting plate 25 a swingable mounting member orpitch plate 78 of sub: stantially the same shape and size as seen inFig. 5. At its center and adjacent its upper edge, the plate 78 isswingably suspended upon a heavy pivot 79 anchored in the plate 25, andadditional support is provided by guide pins 80, also anchored in theplate 25 adjacent its front and rear ends, and projecting outwardthrough arcuate slots 81 in the plates 78. These slots 81 are curved onarcs centered on the axis of the pivot 79 so as to permit swinging orpitching motions of the plate 78 in a longi tudinal, vertical plane withrespect to the machine as a whole. For thus moving the plate 78 I thenprovide a hydraulic ram having a cylinder 82 and plunger 83 which arelocated above the upper edges of the plates 85-78. At one end thecylinder 82 is pivoted at 84 to one corner of a bell crank 85 and thisbell crank is fulcrumed at 86 on a bracket 87 secured to the upper edgeof the plate 78. The remaining corner of the bell crank 85 is thenpivoted at 88 to the bifurcated upper end of a link 89, the lower end ofwhich is pivotally attached to the guide pin at the adjacent end of thestructure. The oppo= site end of the plunger 83 is likewise pivotallyattached at 90 to the corner of a bell crank 91, a second corner ofwhich is fulcrumed at 92 in a bracket 93 secured to the front and uppercorner of the plate 78. The remain ing corner of the bell crank 91 isthen pivoted at 94 in the bifurcated upper end of a similar link 95, thelower end of which is pivotally attached to the aforesaid guide pin 80.Thus the admission of fluid to the opposite ends of the cylinder 82through the flexible conduits, indicated at 96, will effectivelyincrease or reduce the distance between the upper corners of the bellcranks 91, swinging them in opposite directions about their fulcrums8692. Such motion of the bell cranks will then be transmitted to theplate 78 to swing it about its pivot 79, since these bell cranks mustalso swing about their pivot connections to the links 89-95 which areheld at lower ends of the guide pins 80. Thus the plate 78 may bepitched about its pivot 79 in opposite directions under control of thispitching mechanism, and the plate is shown in Fig. 5 as tilted upwardlyat its forward end. The plate 78 is stiflened and reinforced by an upper2,7 flange 97, having suitable openings 98 to pass the links 89-95, andby vertical pairs of parallel webs 99 at its opposite front and rearends. These webs 99 provide mountings for the upwardly turned ends 100of load carrying forks 101 and these ends 100 are detachably mountedbetween the webs by means of heavy carrier pins 102, so that the forks101 project outward toward the open side of the machine in parallelrelation.

These forks serve as supports for a load holder or skid of elongatedrectangular form, comprising a sub-frame designated generally at 103,superimposed upon which is a load supporting or main frame 104. Themanner in which the load itself is supported upon the frame 104 isimmaterial, and this frame may, of course, be provided with any suitablesupporting brackets or clamps according to the nature of the load to behandled. As here shown the load, designated at L, is an elongatedcylindrical object, such as a heavy pipe, and it is held on the frame104 by suitable clamps 105 and cradles 106. The sub-frame 103 isprovided with depending clips or socket means 107 at opposite ends andat its inner and outer corners into which the forks 101 fit, as bestshown in Fig. 3, in order to support the load holder in its entirety.These clips 107 depend from a base plate 108 on which there rests a topplate 109 having inner and outer flanges 110, and guide rollers 111 arejournaled on these flanges. Forming part of the frame 104 are guidechannels 112 which face in opposite directions and are travel mountedupon the guide rollers 111, so that the frame 104 may have a fore andaft or translate motion with respect to the sub-frame 103. For thusmoving or translating the load holder frame 104 there is provided ahydraulic ram having a cylinder 113 and plunger 114. At one end thecylinder 113 is attached at 115 to a cross bar 116 joining the aforesaidchannels 112, and at the opposite end of the ram the plunger 114 isattached at 117 to a bracket 118 secured to the top plate 109. Thus theopposite movement of the plunger 114, by the selective admission offluid to the opposite ends of the cylinder 113 through flexible conduits119, will move the frame 104 forward or rearward as the case may be withrespect to the top plate 109 which, as will be presently described, isheld against corresponding movement with respect to the base plate 109secured upon the forks 101. The frame 104 further comprises main foreand aft side channels 120 and these are suitably cross connected andbraced, as designated throughout at 121.

At their centers the plates 103-109 are connected by a vertical pivot112 about which the plate 109 and the frame 104, as supported thereon,may be swung in a generally horizontal plane in order to yaw the frame104 and load, as indicated in Fig. 2. The plate 109 is further providedwith arcuate slots 123 in which guide pins 124, secured to the baseplate 103, slide in order to hold the plates in proper assembly whilepermitting these yaw motions. A hydraulic ram comprising a cylinder 125and plunger 126 is located beneath the plate 109 outwardly of the forks101, and at one end the cylinder 125 is connected at 127 to a bracket128 secured to the base plate 108. At the opposite end of the ram theplunger 126 is pivotally connected at 129 to a bracket 130 dependingfrom the exposed lower surface of the plate 109 so that the selectiveadmission of fluid to the opposite ends of the cylinder 125, through theflexible conduits 131, will swing the top plate 109 about its pivot 122to yaw the load supported upon the frame 104 as will be understood.

It is believed that the operation of the machine as thus far describedwill be readily apparent and it will, of course, be possible to maneuverand position the load L in no less than six different directions orplanes, either selectively or in combination, and all independently ofthe movement of the machine as a whole. All of these motions are carriedout hydraulically and the supply of fluid to the lifting ram cylinders22 will raise and lower the load, while control of the fluid admissionto the cylinders 41 of the traversing rams will traverse the load, sothat a load may be picked up from alongside the machine and eitherraised straight up in a plane parallel with the machine or drawn inwardand deposited on the supports 1112 for transport. Control of the fluidadmission to the tilting ram cylinder 66 will control the tilt angle ofthe load transversely of the machine, while control of the fluidadmission to the ram cylinder 82 will pitch the entire load in a planelengthwise of the machine, or substantially parallel to the direction oftravel. Control of fluid supplied to the ram cylinder 113 will thentranslate or move the load bodily either forward or rearwardly, andfinally the control of the fluid supplied to the cylinder 125 willpermit the load to be yawed to swing its opposite forward and rearwardends from side to side. As in the machine of my prior applicationpreviously identified herein, I provide a control group or valve bankconvenient to the operators station 16, as designated generally at 132,so that the operator seated in the cab 17 may, by the propermanipulation of a set of valve levers, control the fluid flow to andfrom the various ram cylinders. So that the operator may observe theposition of the load the cab 17 is made almost completely of glass ortransparent plastic in its upper portion, but in order to obtain thefull benefit of the precise control of the movements of the load in alldirections it many times will be desirable for an operator to actuallyride the load holder, as the load is elevated and maneuvered about, toposition it in the desired angle and plane. For this purpose I providean operators platform 133 on the forward, inner side of the load holderframe 104, upon which the operator may stand alongside and close to theload itself. A duplicate control group or valve bank 134 is thenprovided convenient to the hand of an operator standing on thisplatform, and for the support of this control group I provide a swingingboom 135, on the outer end of which the controls are mounted. This boom135 has a vertical portion 136 which is swiugably mounted in a suitablesocket 137 forming part of reinforcements 138 for the flanges 26, andthus while the boom will support the control group 134 independently ofthe load itself, so that the movements thereof are not interfered with,the boom will nevertheless raise and lower with the load so as tomaintain its position convenient to the operator on the platform 133.The necessary cabled, flexible conduits 139 for connecting the controlgroup into the hydraulic system are brought down alongside a verticalstandard 140 and their length is such as to permit all of the necessarymovements as the load is raised and lowered and moved inward andoutward. As best seen in Figs. 2 and 4 the control group 134 has a totalof six valve control handles, indicated throughout at 141, forcontrolling the movements of the load to the six different directionsand angles, and while I do not here include a control valve for themanipulation of the jacks 76 from the operators station on the loadholder, such a valve may, of course, be added if desired or required.

It is understood that suitable modifications may be made in thestructure as disclosed, provided such modifications come within thespirit and scope of the appended claims. Having now therefore fullyillustrated and described my invention, what I claim to be new anddesire to protect by Letters Patent is:

1. A load handling and positioning machine of the character described,comprising in combination, a traveling frame having an opening throughone side, a load holder, a loader mechanism mounting the holder for upand down movements in said opening, means mounting the loader mechanismfor traverse movements in and out of said opening, means mounting themechanism for tilting movements in a vertical plane and transverse tothe direction of travel of the machine, a horizontal pivot connectingthe holder to said mechanism for pitch adjustments in a vertical planeand parallel to the direction of travel, a vertical pivot sup- 7 portingthe load holder for yawing motions in a horizontal plane,rollerssupporting the load holder for translate motions parallel withthe direction of travel, and separate fluid motors operatively connectedto move the load holder in all of said directions.

2. In a load handling and manipulating machine of the characterdescribed, a traveling frame and a vertically movable and tiltable andhorizontally traversable loader thereon, cooperating plates carried bythe loader and a horizontal pivot connecting one plate to the other forpitching motion, fixed pins in one plate and the other having arcuateslots to guide the movements of the movable plate, a fluid motor andmeans connecting same to the plates for moving the one plate, and a loadcarrier connected to the movable plate.

'3. In a load handling and manipulating machine of the characterdescribed, a traveling frame and a vertically movable and tiltable andhorizontally traversable loader thereon, cooperating plates carried bythe loader and a horizontal pivot connecting one plate to the other forpitching motion, fixed pins in one plate and the other having arcuateslots to guide the movements of the movable plate, a fluid motor andmeans connecting same'to the plates for moving the one plate, and a loadcarrier connected to the movable plate, the said fluid motor having acylinder and an extensible and retractable plunger, bell cranksconnected to opposite ends of the cylinder and plunger and to one of theplates, and links connecting the bell cranks to the other plate to movethe movable plate as the plunger is extended and retracted.

4. In a load handling and manipulating machine of the character,described, a traveling frame and a vertically movable and tiltable andhorizontally traver'sable loader thereon, cooperating plates carried bythe loader and a horizontal pivot connecting one.plate to the other forpitching motion, means for moving the pivoted plate, a load holderhaving a sub-frame and a supporting frame thereon, means mounting thesub-frame on the pivoted plate, a vertical pivot connecting the framesand means for swinging the supporting frame about said pivot to yaw aload carried on that frame, and one frame having fixed pins and theother having arcuate slots engaging the pins to guide the frame in itsyaw movements.

5. In a load handling and manipulating machine of the characterdescribed, a traveling frame and a vertically movable and tiltable andhorizontally traversable loader thereon, cooperating plates carried bythe loader and a horizontal pivot connecting one plate to the other forpitching motion, means for moving the pivoted plate,

a load carrier having a sub-frame and a load supporting frame, meansconnecting the sub-frame to the pivoted plate, a vertical pivotconnecting the frames and means for swinging the load supporting frameon that pivot to yaw a load carried by the frame, rollers supporting theload supporting frame on the sub-frame for longitudinal translatemovements, and means for moving the load supporting frame on saidrollers. :6. In a load handling and manipulating machine of thecharacter described, a traveling frame and a vertically movable andtiltable and horizontally traversable loader thereon, cooperating platescarried by the loader and a horizontal pivot connecting one plate to theother for pitching motion, means for moving the pivoted plate, a loadcarrier having a sub-frame and a load supporting frame, means connectingthe frames and means for swing ing the load supporting frame on thatpivot to yaw a load :carried by the frame, rollers supporting the loadsupporting frame on the sub-frame for longitudinal translate movements,and means for moving the load supporting frame on said rollers, the saidlast two mentionedjmeans'each comprising a fluid motor having a cylinderand plunger and connected between the subframe. and load supportingframe.

7'. In a load handling and manipulating machineof the characterdescribed, a traveling frame and a vertically movable and tiltable andhorizontally traversable loader thereon, cooperating plates carried bytheloader and a horizontal pivot connecting one plate to the other forpitching motion, means for moving the pivoted plate, a load carrierhaving a sub-frame and a load supporting frame, means connecting thesub-framevto the pivoted plate, a vertical pivot connecting the framesand means for swinging the load supporting frame on that pivot to yaw aload carried by the frame, the said frame having longitudinal channelsand rollers connecting the channels to support the load supporting framefor back and forth translate motions with respect to the sub-frame, andmeans for moving the load supporting frame on said rollers.

8. In a load handling and manipulating machine of the characterdescribed, a traveling frame and a vertically movable and tiltable andhorizontally traversable loader thereon, cooperating plates carried bythe loader and a horizontal pivot connecting one plate to the other forpitching motion, means for moving the pivoted plate, a load holderhaving a sub-frame and a supporting frame thereon, means mounting thesub-frame on the pivoted plate, a vertical pivot connecting the framesand means for swinging the supporting frame about said pivot to yaw aload carried on that frame, and one frame having fixed pins and theother having arcuate slots engaging the pins to guide the frame in itsyaw movements, the said means mounting the sub-frame on the pivotedplate comprising forks attached to said plate, and the 'subframe havingsocket means to releasably receive the said forks.

9. In a machine for loading and manipulating materials, a travelingframe having front and rear wheeled supports and connecting means at oneside of the frame, a loader mounted between said supports, a loadholder, means cooperating with the loader and load holder for moving thelatter vertically and horizontally and in angular directions, said meansincluding a plurality of fiuid motors and separate controls on the framefor said fluid motors, a platform on the load holder on which anoperator may stand and ride with the load, a swingable boom on theloader, and duplicate controls for the fluid motors carried by said boomand held thereby convem'ent to an operator on the platform.

10. In a machine for loading and manipulating materials, a travelingframe having front and rear wheeled supports and connecting means at oneside of the frame, a loader mounted between said supports, a loadholder, means cooperating with the loader and load holder for moving thelatter vertically and horizontally and in angular directions, said meansincluding a plurality of fluid motors and separate controls on the framefor said fluid motors, an operators station on the load holder on whichan operator may ride with the load, duplicate controls for the fluidmotors, and means supporting said duplicate controls independently ofthe load holder but in position for operation by an operator at saidstation.

11. In a loader having a frame and loader and a load holder, meansincluding a plurality of fluid motors for moving the load holder in aplurality of directions, a fluid supply system for the fluid motors andincluding dulicate control groups for controlling the motions of theload holder, separate operators stations on the frame and load holder,one of said control groups being located adjacent each of said stations,and a swinging boom on the loader and carrying the control group for theoperators station on the load holder. u

12. In a loader of the character described, a frame, a verticallytelescopic tower on the frame, means for mov ing the tower up and down,said tower having guide channels, a vertically movable load carriermember and guide rollers mounted thereon for guide engagement with saidchannels, means for moving the load carrier member, and auxiliaryrollers carried by the member and 0p- References Cited in the file ofthis patent UNITED STATES PATENTS Nickles Nov. 4, 1941 Westervelt, Jr.Oct. 29, 1946 Way June 3, 1947 Johnson Sept. 30, 1947 10 Miller Sept.28, 1948 Johnson Aug. 23, 1949 Stewart Feb. 5, 1952 Hegarty Apr. 1, 1952Turner June 3, 1952 Cardiff June 17, 1952 Stanley Oct. 14, 1952Mullgardt Dec. 9, 1952 Lull Dec. 16, 1952

